649238 has 4 divisors (see below), whose sum is σ = 973860. Its totient is φ = 324618.

The previous prime is 649217. The next prime is 649261. The reversal of 649238 is 832946.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 832946 = 2 ⋅416473.

It is a congruent number.

It is an unprimeable number.

649238 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162308 + ... + 162311.

It is an arithmetic number, because the mean of its divisors is an integer number (243465).

2⁶⁴⁹²³⁸ is an apocalyptic number.

649238 is a deficient number, since it is larger than the sum of its proper divisors (324622).

649238 is a wasteful number, since it uses less digits than its factorization.

649238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324621.

The product of its digits is 10368, while the sum is 32.

The square root of 649238 is about 805.7530639098. The cubic root of 649238 is about 86.5900473391.

The spelling of 649238 in words is "six hundred forty-nine thousand, two hundred thirty-eight".